ci: use python-node runner image for fast dependency installs

.forgejo/workflows/ci.yml

@@ -8,24 +8,18 @@ on:
 
 jobs:
   test:
-    runs-on: ubuntu-latest
+    runs-on: python-node
     defaults:
       run:
         working-directory: services/api
     steps:
       - uses: actions/checkout@v4
 
-      - name: Install Python
-        run: |
-          apt-get update && apt-get install -y python3 python3-pip python3-venv
-          python3 -m venv /tmp/venv
-          echo "PATH=/tmp/venv/bin:$PATH" >> $GITHUB_ENV
-
       - name: Install dependencies
-        run: /tmp/venv/bin/pip install -e ".[dev]"
+        run: pip install -e ".[dev]"
 
       - name: Lint
-        run: /tmp/venv/bin/ruff check app/ tests/
+        run: ruff check app/ tests/
 
       - name: Run tests
-        run: /tmp/venv/bin/python -m pytest tests/ -v
+        run: python -m pytest tests/ -v